EX-24 6 colb2015ex24.htm POWER OF ATTORNEY Exhibit


EXHIBIT 24
POWER OF ATTORNEY
The director of Columbia Banking System, Inc. (the “Company”), whose signature appears below, hereby appoints Melanie J. Dressel and William T. Weyerhaeuser, or either of them, as his/her attorney to sign, in his/her name and behalf and in any and all capacities stated below, the Company's Form 10-K Annual Report pursuant to Section 13 of the Securities Exchange Act of 1934, and likewise to sign any and all amendments and other documents relating thereto as shall be necessary, such person hereby granting to each such attorney power to act with or without the other and full power of substitution and revocation, and hereby ratifying all that any such attorney or his substitute may do by virtue hereof.
This Power of Attorney has been signed by the following persons in the capacity indicated, on the 24th day of February, 2016.
 
Signature 
 
Title 
 
 
 
/s/ WILLIAM T. WEYERHAEUSER
 
Chairman
William T. Weyerhaeuser
 
 
 
 
 
/s/ MELANIE J. DRESSEL
 
President, Chief Executive Officer and Director
Melanie J. Dressel
 
 
 
 
 
/s/ DAVID A. DIETZLER
 
Director
David A. Dietzler
 
 
 
 
 
/s/ CRAIG D. EERKES
 
Director
Craig D. Eerkes
 
 
 
 
 
/s/ FORD ELSAESSER
 
Director
Ford Elsaesser
 
 
 
 
 
/s/ MARK A. FINKELSTEIN
 
Director
Mark A. Finkelstein
 
 
 
 
 
/s/ JOHN P. FOLSOM
 
Director
John P. Folsom
 
 
 
 
 
/s/ THOMAS M. HULBERT
 
Director
Thomas M. Hulbert
 
 
 
 
 
/s/ MICHELLE M. LANTOW
 
Director
Michelle M. Lantow
 
 
 
 
 
/s/ S. MAE FUJITA NUMATA
 
Director
S. Mae Fujita Numata
 
 
 
 
 
/s/ ELIZABETH W. SEATON
 
Director
Elizabeth W. Seaton